The Epidemiology of Chronic Diseases: An overview

Contagious diseases: Those diseases which can be spread are called contagious diseases.There are many different types of contagious diseases and many different ways that diseases can be spread. Colds, influenza, measles, tuberculosis, chickenpox, ringworm and cholera are some examples of contagious diseases. Virus, harmful bacteria, fungi and other parasites cause them. ................
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